NPR: National Public Radio
Npr Videos: Skunk Bear: Finding the Speed of Light With Peeps
There's a new use for those stale Easter marshmallows you have lying around - calculating a constant that governs the universe. [5:06]
Khan Academy
Khan Academy: Standing Waves in Closed Tubes
Find out why you can make music by blowing into empty bottles. [9:57]
Sophia Learning
Sophia: How We See: Lesson 2
This lesson will introduce you to the anatomy and physiology of the human visual system, its connection to the brain and how this system processes light. It is 2 of 3 in the series titled "How We See."